United Kingdom - Vickers Light Tank Variants

The Mark IA had a larger superstructure and a larger turret to give room for operating the machine gun. Horstmann suspension with horizontal coil springs replaced the leaf springs of the Mark I. Although it could give an easy ride under moderate conditions, the springs could under certain circumstances cause an uncontrollable bounce.

The Mark IA tanks sent to India in 1931 for trials received modifications to improve engine cooling in the hotter climate and various means were experimented with to reduce the heat for the crew as well.